题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090212-29319.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090212-55149.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090212-71631.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090212-70577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090212-66235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090213-31046.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090213-42721.png)
答案
解析
解:∵∠C=90°,∠ABC=60°,
∴∠A=30°,
∵BD平分∠ABC,
∴∠CBD=∠ABD=∠A=30°,
∴BD=AD=8,
∴CD=
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090213-69210.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090213-69210.png)
故填空答案:4.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090204-72406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090204-46364.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090205-10562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090205-95208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090205-90744.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090206-55249.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090206-89952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090206-37101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090200-59194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090200-77699.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090201-48844.png)
如图,已知
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090152-14457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090153-22956.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090154-45484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090154-90566.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090154-95903.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090154-28707.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090154-28305.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090154-62256.png)
思路点拨:
小题1:⑴由已知条件
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090152-14457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090153-22956.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090155-43210.png)
小题2:⑵同理由已知条件
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090154-45484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090155-25356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090154-95903.png)
小题3:⑶要证
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090154-28305.png)
小题4:⑷要证(3)中所填写的两条线段相等,可以先证明….请你完成证明过程:
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090140-33242.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090141-79939.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090141-96446.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090141-41198.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090141-54114.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090142-38870.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090142-89833.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090142-79764.gif)
小题1:(1)探究:线段
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090142-60813.gif)
小题2:(2)若点
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090142-60856.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090143-85473.gif)
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![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090143-77311.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090142-60813.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090143-44356.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090133-99207.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090133-81851.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090133-33519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090133-98425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090134-97926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090134-72869.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090134-39314.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090133-99207.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090134-53188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103090134-32986.png)
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